*{
    margin: 0px;
    padding: 0px;
    height: 100vh;
    overflow: hidden;
}

.container{
    width: 100vw;
    height: 93vh;
    margin: 0px auto;
    background-color: gold;
    padding-top: 7vh;
}
@media screen and (min-width: 320px) and (max-width: 370px) {
    .head_img{
        width: 120px;
        height: 120px;
        margin: 0px auto;
        border-radius: 60px;
        background-image: url("../img/head.jpg");
        background-size: 120px 120px;
    }
    .qr{
        width: 230px;
        height: 230px;
        margin: 50px auto 0px auto;
        /*background-image: url("../img/weChat.png");*/
        /*background-size: 230px 230px;*/
    }
    .footer{
        width: 100vw;
        height: 20px;
        line-height: 20px;
        text-align: center;
        font-size: 14px;
        color: white;
        position: absolute;
        left: 0px;
        bottom: 10px;
    }
    .option{
        width: 210px;
        height: 50px;
        margin: 150px auto 0px auto;
    }

}
@media screen and (min-width: 371px) and (max-width: 410px) {
    .head_img{
        width: 170px;
        height: 170px;
        margin: 0px auto;
        border-radius: 85px;
        background-image: url("../img/head.jpg");
        background-size: 170px 170px;
    }
    .qr{
        width: 280px;
        height: 280px;
        margin: 80px auto 0px auto;
        /*background-image: url("../img/weChat.png");*/
        /*background-size: 280px 280px;*/
    }
    .footer{
        width: 100vw;
        height: 20px;
        line-height: 20px;
        text-align: center;
        font-size: 18px;
        color: white;
        position: absolute;
        left: 0px;
        bottom: 10px;
    }
    .option{
        width: 210px;
        height: 50px;
        margin: 200px auto 0px auto;
    }
}
@media screen and (min-width: 411px) and (max-width: 500px) {
    .head_img{
        width: 170px;
        height: 170px;
        margin: 0px auto;
        border-radius: 85px;
        background-image: url("../img/head.jpg");
        background-size: 170px 170px;
    }
    .qr{
        width: 310px;
        height: 310px;
        margin: 100px auto 0px auto;
        /*background-image: url("../img/weChat.png");*/
        /*background-size: 310px 310px;*/
    }
    .footer{
        width: 100vw;
        height: 20px;
        line-height: 20px;
        text-align: center;
        font-size: 18px;
        color: white;
        position: absolute;
        left: 0px;
        bottom: 10px;
    }
    .option{
        width: 210px;
        height: 50px;
        margin: 220px auto 0px auto;
    }
}
@media screen and (min-width: 501px) {
    .head_img{
        width: 170px;
        height: 170px;
        margin: 0px auto;
        border-radius: 85px;
        background-image: url("../img/head.jpg");
        background-size: 170px 170px;
    }
    .qr{
        width: 350px;
        height: 350px;
        margin:60px auto 0px auto;
        /*background-image: url("../img/weChat.png");*/
        /*background-size: 350px 350px;*/
    }
    .footer{
        width: 100vw;
        height: 20px;
        line-height: 20px;
        text-align: center;
        font-size: 18px;
        color: white;
        position: absolute;
        left: 0px;
        bottom: 10px;
    }
    .option{
        width: 210px;
        height: 50px;
        margin: 150px auto 0px auto;
    }
}
.item{
    width: 50px;
    height: 50px;
    margin: 0px 10px;
    float: left;
    /*background-color: #65ffeb;*/
}